Dendrolycosa lepida ( Thorell 1890 )

Jäger, Peter, 2011, Revision of the spider genera Nilus O. Pickard-Cambridge 1876, Sphedanus Thorell 1877 and Dendrolycosa Doleschall 1859 (Araneae: Pisauridae), Zootaxa 3046, pp. 1-38 : 25-27

Dendrolycosa lepida ( Thorell 1890)

Figs 112–124 , 167 : 13

Dolomedes lepidus Thorell 1890: 135 (Description of juvenile female; holotype, subadult female, from Sumatra, Ajer Mancior, O. Beccari leg. VIII 1878, MCSN, examined). Thorell 1892: 149 (extended redescription; not sub Dendrolycosa as listed in Platnick 2011).

Dendrolycosa lepida ,— Roewer 1955b: 112 (Transfer to Dendrolycosa ).

Additional material examined (2 females). 1 female, Sumatra, Fort de Kock (=Bukkittinggi), leg. E. Jacobson, IX.1913, RII 4565 ( SMF 9904565). 1 female, Sumatra, Fort de Kock (=Bukkittinggi), forest, 920 m altitude, leg. E. Jacobson, 1924, RII 4558 ( SMF 9904558).

Note. The holotype is a subadult female with a pre-epigyne developed at the outer (older) cuticle ( Fig. 116 ). On the inner cuticle an epigyne and vulva are developed ( Figs 117–119 ). The cuticle was very soft and, after dissection, it was not clear whether it was fully developed or whether it would have substantially changed shape after moulting, which has been reported from Heteropoda homstu ( Jäger 2008a: figs 267–273). However, due to the congruence in the geographic occurrence (both localities, Bukkittinggi and Ajer Mancior are 18 km directly apart), the distinct and uniquely spotted dorsal opisthosoma and the general congruence in epigyne morphology (i.e. deep posterior incision of carina, narrow fossae) all three specimens examined are considered conspecific. Therefore, a redescription is provided on the base of the two adult specimens.

Diagnosis. Medium sized spiders with body length 12.9–15.1 mm and colour pattern A with distinct large spots on opisthosoma ( Figs 120–124 ). Epigyne with entire carina, the latter with deep posterior incision, varying slightly in shape. Fossae narrow and slightly bent laterad. Copulatory ducts covering neither spermathecal heads nor bases ( Figs 112–119 ).

Redescription. Female (SMF 9904565). PL 5.3, PW 4.1, AW 2.3, OL 7.6, OW 4.4. Eye diametres: AME 0.23, ALE 0.22, PME 0.24, PLE 0.27. Eye interdistances: AME–AME 0.13, AME–ALE 0.12, PME–PME 0.19, PME– PLE 0.37, AME–PME 0.33, ALE–PLE 0.54, clypeus AME 0.30, clypeus ALE 0.31. Leg and pedipalpus measurements: pedipalpus 6.1 (2.0, 1.0, 1.3, -, 1.8); leg I 19.3 (5.1, 2.2, 4.5, 4.4, 2.1); leg II 19.7 (5.7, 2.2, 4.5, 4.3, 2.0); leg III 12.9 (4.7, 1.8, 3.8, 3.8, 1.8); leg IV 19.3 (5.5, 2.0, 4.6, 5.1, 2.1); leg formula 2(41)3. Spination: palp: femur 161, patella 110, tibia 1102, tarsus 1004; Femur I 435, II 537, III 336, IV 333; Patella I–IV 121, Tibia I 1217, II 2225, III 2226, IV 2225; Metatarsus I 3027, II 2027, III 3037, IV 3038 (metatarsi I–IV with distal median ventral spine). Chelicerae with 3 anterior (median largest) and 3 equally sized posterior teeth. Paired leg claws with c. 12 teeth. Copulatory organ as in diagnosis. Epigynal field wider than long, with one pair of long slit sense organs antero-laterally. Central part of middle field with deep impression situated dorsally of posterior incision of carina. Fine wrinkles in posterior lateral lobes of epigyne. Internal duct system with medium sized copulatory ducts. Base of spermathecae round, large, and not covered by copulatory ducts ( Figs 112–119 ). Colour in ethanol (120–124): yellowish to reddish brown, specimen faded with white hairs and, partly indistinct, dark pattern. Dorsal prosoma with 2 broad bright submarginal bands, which consist of white hairs. Eye region and fovea dark. Sternum and ventral coxae yellowish brown, without pattern. Gnathocoxae yellowish brown, brighter distally; labium reddish brown with white distal lip. Chelicerae reddish to yellowish brown with basal humps bright. Palp and legs with indistinct marks. Dorsal opisthosoma with characteristic dark patch in anterior half bordered by thin bright margins and a lighter brown folium, the latter darker and with strongly undulating lateral margins in posterior half; especially anterior half of opisthosoma half with distinct dark spots. Lateral opisthosoma with irregular patches. Ventral opisthosoma brighter with 4 indistinct longitudinal lines.

Male: unknown.

Variation. The second female is slightly larger (PL 6.5, PW 5.1, AW 3.0, OL 8.6, OW 6.1) than the holotype. Chelicerae with 3 anterior and 4 posterior teeth. The holotype has a palp claw with 9–10 teeth.

Distribution. Indonesia, Sumatra: Ajer Mancior (type locality), Bukkittinggi ( Fig. 167 : 13).

Figures

FIGURE 167. Records of Dendrolycosa spp. 1 Tanzania: Moshi. 2 – 5 India (2 N Gujarat; 3 Bangalore; 4 Bobbili; 5 Darjeeling). 6 Burma: Tharrawaddy, Kyeikpadem. 7 China: Yunnan: Menglun. 8 – 9 Laos (8 Vientiane; 9 Tad Fane). 10 South Vietnam. 11 – 12 Philippines (11 Luzon; 12 Mindanao). 13 – 16 Indonesia (13 Sumatra: Bukkittinggi, Acer Manjon; 14 Java: Tengah; 15 Ambon; 16 Maluku Islands). 17 New Guinea (no exact locality is known). 18 – 19 Australia: Queensland (18 Cape York; 19 Rockhampton). 20 New Caledonia: Loyalty Islands.

FIGURES 112 – 119. Dendrolycosa lepida (Thorell 1890) from Indonesia, Sumatra, female copulatory organs (112, 115, 117 epigyne, ventral view; 113, 118 vulva, dorsal view; 114, 119 schematic course of internal duct system; 116 pre-epigyne, ventral view). 112 – 114 SMF 9904565. 115 SMF 9904558. 116 – 119 Holotype, female.

FIGURES 120 – 125. Dendrolycosa spp., habitus (120, 122, 125 dorsal view; 121, 124 lateral view; 123 ventral view). 120 – 124 Dendrolycosa lepida (Thorell 1890) from Indonesia, Sumatra (120 – 121 Holotype, female; 122 – 124 SMF 9904558). 125 Dendrolycosa inquirenda (Strand 1911) comb. nov., holotype, immature, from Indonesia, Moluccas (SMF 4763).